Siemens SINUMERIK 840D sl Turning Operating Manual page 457

When set to "automatic", rounding is always performed if the angle between the cutting edge
and the contour exceeds a certain value. The angle is set in a machine data element.
Alternating cutting depth
Instead of working with constant cutting depth D, you can use an alternating cutting depth to
vary the load on the tool edge. As a consequence you can increase the tool life.
Figure 10-6
The percentage for the alternating cutting depth is saved in a machine data element.
Cut segmentation
To avoid the occurrence of very thin cuts in cut segmentation due to contour edges, you can
align the cut segmentation to the contour edges. During machining the contour is then divided
by the edges into individual sections and cut segmentation is performed separately for each
section.
Set machining area limits
If, for example, you want to machine a certain area of the contour with a different tool, you can
set machining area limits so that machining only takes place in the area of the contour you have
selected. You can define between 1 and 4 limit lines.
The limit lines must not intersect the contour on the side facing the machining.
This limit has the same effect during roughing and finishing.
Turning
Operating Manual, 06/2019, A5E44903486B AB
Machine manufacturer
Please observe the information provided by the machine manufacturer.
Alternating cutting depth
Machine manufacturer
Please observe the information provided by the machine manufacturer.
Programming technology functions (cycles)
10.3 Contour turning
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